Quick release thumb screw



FIG. 1 is a front view of a quick release thumb screw;

FIG. 2 is a left view of the quick release thumb screw;

FIG. 3 is a top view of the quick release thumb screw;

FIG. 4 is a bottom view of the quick release thumb screw;

FIG. 5 is a first perspective view of the quick release thumb screw; and,

FIG. 6 is a second perspective view of the quick release thumb screw.

The back view is a mirror image of the front view; the right view is a mirror image of the left view. 

CLAIM The ornamental design for a quick release thumb screw, as shown and described. 